Roger W Griffith, P.E.

Underground Gas Piping System Requirements in the I-Codes

CodeNotes: Underground Gas Piping System Requirements in the I-Codes - ICC This CodeNotes resource provides an overview underground gas piping system requirements based on the 2021 International Codes.

Learn to specify pressure-regulating devices in water-based fire protection.

Learn to specify pressure-regulating devices in water-based fire protection | Consulting - Specifying Engineer Pressure-regulating devices are required to maintain safe system working pressures

Mixing valves play a crucial role in water safety

Mixing valves play a key role in water safety Legionella is a concerning bacteria found in freshwater environments. When inhaled, it can cause Legionnaire's disease, a severe form of pneumonia, especially dangerous for those with weakened immune systems.

A Plumber's Guide to Backwater Valves

Feature 03 Sewage backup can wreak havoc on properties, leading to costly repairs and potential health risks.

Point-of-use water disinfection: a public health solution

Point-of-use water disinfection: a necessary public health solution Point-of-use (POU) water disinfection isn't just about public health; it's also an essential engineering strategy in modern water systems, tackling waterborne diseases by ensuring safe drinking water directly at the point of consumption.

EPA Phasedown of Hydrofluorocarbon Refrigerants: Where Do We Stand?

EPA Phasedown of Hydrofluorocarbon Refrigerants: Where Do We Stand? - ICC The EPA's SNAP Program, has established what refrigerants can be used as ‘an alternative or acceptable’ refrigerant to HFC.

Building type is a key factor in the type of water distribution system for buildings.

Building type is a key factor in the decision-making process Plumbing systems in buildings require careful selection of vertical or horizontal piping distribution. The building type is a key factor in this decision, and relevant codes and standards must be followed.

Mixing Valve Standards

Mixing Valves » Working Pressure Magazine The ability to have water delivered on demand at a comfortable temperature and without a concern of scalding is a surprisingly new experience.

HVAC system balancing reports: A roadmap to effective design and troubleshooting

HVAC system balancing reports: A roadmap to effective design and troubleshooting | Consulting - Specifying Engineer A testing and balancing report can be a key tool for design engineers in buildings to identify issues and create quick, effective solutions

Backflow Preventers with Beverage Dispensers

Backflow Preventers with Beverage Dispensers » Working Pressure Magazine There is one application of backflow preventers that is often overlooked – the use of backflow preventers with beverage dispensers.

What’s the Difference Between ASSE 1017 and ASSE 1070?

What’s the Difference Between ASSE 1017 and ASSE 1070? » Working Pressure Magazine Devices that are certified to ASSE 1017 are often certified to ASSE 1070 as well. So, what are the differences between the two standards?

A summary of Temperature Control Devices

Temperature Control Devices » Working Pressure Magazine ASSE has a portfolio of standards related to temperature control devices and their applications. This article includes a brief summary of these standards and the use of the devices in the field.

AHU Design for Critical Care Facilities

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Water Heater Safety in the 2021 IRC

CodeNotes: Water Heater Safety in the I-Codes - ICC This International Code Council CodeNotes resource provides tips on how to properly install and maintain water heaters in your home.

Establishing setpoints for DCV

Commissioning | October 2023 | Engineered Systems Demand Controlled Ventilation (DCV) is a control strategy which aims to vary the amount of ventilation air a system provides a space based on the real-time ventilation requirements (i.e. the ventilation demand) of the space.

How to Select VAV Boxes

Feature Lawson | October 2023 | Engineered Systems VAV selection is a complicated and time-consuming process.

Tips for installing and servicing CPVC pipes

Tips for installing and servicing CPVC pipes When installed properly and protected from incompatible chemicals, CPVC can deliver years of reliable service in even the most aggressive water conditions. Get tips on installing and servicing CPVC pipes.

A plumber’s guide to residential floor drain selection and installation

A plumber’s guide to residential floor drain selection and installation Eight important factors to consider when selecting and installing a residential floor drain.

Check out my latest blog post - Does the Plumbing Code Prohibit Trap Seal Devices?

Does the Plumbing Code Prohibit Trap Seal Devices? - Roger W. Griffith, P.E. Are trap seal devices, in lieu of trap primers, prohibited by the plumbing code ?

An introduction to dedicated outdoor air systems.

Back to basics: Introduction to dedicated outdoor air systems | Consulting - Specifying Engineer Outdoor air is an important component of a building’s overall health and well-being

Decentralization: The Future of Hot Water Generation

Decentralization: The Future of Hot Water Generation The time is now for domestic hot-water systems with heat-exchanger solutions. They will help reduce water aging while keeping temperatures in safe ranges.

Lead Structural Engineer Shares Insights on the Burj Khalifa, the World’s Tallest Structure

Lead Structural Engineer Shares Insights on the Burj Khalifa, the World’s Tallest Structure - ICC The goal of the Burj Khalifa Tower is not simply to be the world’s highest building; it is to embody the world’s highest aspirations.

Passive Fire Protection in the International Building Code – Part 2

Passive Fire Protection in the International Building Code – Part 2 - ICC Explores how the International Building Code covers the standard fire test methods for determining fire-resistance ratings of materials.

Demystifying HVAC Zoning

Feature Lawson | July 2023 | Engineered Systems How to use VAV systems for HVAC zoning.

Remediation tactics for Legionella outbreaks

James Dipping: Remediation tactics for Legionella outbreaks My last two columns discussed both chemical and non-chemical additives or technologies that I treat as “must consider” for plumbing engineers in their design practices to reduce the risk of Legionella bacteria developing in the domestic water system. As I mentioned, these topics might not be a c...

Protection of Exterior Foundation Insulation

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ASHRAE Completes Draft of Pathogen Mitigation Standard for Indoor Air Quality

ASHRAE Completes Draft of First-Ever Pathogen Mitigation Standard - ASPE Pipeline ASHRAE Standard 241P provides minimum requirements for HVAC-related measures for airborne pathogen mitigation.

How to Keep Private Water Systems Safe

How Design Professionals Can Work with Owners to Keep Private Systems Safe - ASPE Pipeline Recently, I wrote an article regarding potable water and backflow protection. Water is something that most of us take for granted, until we cannot find a clean and reliable source. It is a basic need of most living organisms. Water is one thing we humans cannot live without. Humans can survive longe...

High-rise residential HVAC design for efficiency

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